v0.6.3

LibCURL v0.6.3

Diff since v0.6.2

Closed issues:

• cacert is not relocatable (#96)

Merged pull requests:

• Vararg ABI on PowerPC (#95) (@vchuravy)
• Add GitHub Actions CI; remove Travis CI; remove AppVeyor CI (#97) (@DilumAluthge)
• README: add GHA badge, remove Travis badge, remove AV badge (#98) (@DilumAluthge)
• add CURLOPT_MAXAGE_CONN (#99) (@tanmaykm)
• bump version to v0.6.3 (#100) (@tanmaykm)